Meanings
adjectivethick as a plank (not comparable)
- informalnot comparablesimileVery stupid.
Synonyms: thick as a brick, thick as two short planks, addlebrained, addlepated, airheaded, bee-brained, beef-witted, soft
Synonyms & antonyms
adjectiveVery stupid.
Also see
Translations
Spanish no tener dos dedos de frente, más bruto que un arado
- no tener dos dedos de frenteTranslations
- más bruto que un aradoTranslations
- más simple que el mecanismo de un botijoTranslations
- más tonto que una piedraTranslations
Cite this entry
APA
thick as a plank. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/thick%20as%20a%20plank
MLA
“thick as a plank.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/thick%20as%20a%20plank. Accessed November 5, 2026.
Chicago
WatkinsX Dictionary, s.v. “thick as a plank,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/thick%20as%20a%20plank.
Source: thick as a plank on Wiktionary, CC BY-SA 4.0.